Question

Assuming that y varies directly x, if y = 4 when x = 2, how do you find y when x = 16?

Answer 1

It is `y=32`

Explanation:

Hence y varies directly with x we must have that
`y=a*x` where a is constant.Hence for x=2 is y=4 we have that

`4=a*2=>a=2` hence for `x=16` we have that

`y=2*x=2*16=32`